2005 Audi TT Quattro Sport Service and Repair Manual

This 2005 Audi TT Quattro Sport Service and Repair Manual covers:

Engine & Drivetrain

• 1.8L 20-valve turbocharged inline-four engine
• Bosch Motronic ME7 engine management system diagnostics
• K04 turbocharger inspection and servicing
• Multi-point fuel injection and ignition system repairs
• Engine cooling and lubrication system servicing
• Exhaust and emissions control system repairs
• 6-speed manual transmission servicing
• Haldex Gen I quattro all-wheel drive system
• Haldex coupling diagnostics and servicing
• Front and rear differential servicing
• Driveshaft and axle repairs

Chassis & Suspension

• quattro Sport suspension diagnostics
• MacPherson strut front suspension
• Independent rear suspension servicing
• Steering system diagnostics and repair
• Wheel alignment specifications
• Suspension component inspection and replacement
• Wheel bearing servicing

Braking Systems

• Sport braking system servicing
• Anti-lock Braking System (ABS)
• Electronic Stability Program (ESP)
• Electronic Brakeforce Distribution (EBD)
• Brake Assist diagnostics
• Brake hydraulic system servicing

Electrical & Wiring

• Complete factory wiring diagrams
• CAN Bus diagnostics
• Charging and starting system diagnostics
• Engine Control Module (ECM)
• Instrument cluster diagnostics
• Power distribution, fuse, and relay assignments
• Driver Information System (DIS)
• Audi Concert audio system diagnostics (where equipped)
• Xenon headlamp diagnostics (where equipped)
• Exterior and interior lighting diagnostics

Air Conditioning & HVAC

• Automatic climate control diagnostics
• HVAC control module servicing
• Refrigerant recovery and recharge procedures
• Heating and ventilation system repairs

Body & Interior

• Remote central locking diagnostics
• Power window and mirror diagnostics
• Lightweight quattro Sport interior components
• Interior trim removal and installation
• Exterior body repair procedures
• Airbag (SRS) system diagnostics

Diagnostics & Troubleshooting

• Audi VAS diagnostic procedures
• Guided Fault Finding (GFF)
• Diagnostic Trouble Code (DTC) troubleshooting
• Control module adaptations
• Component testing procedures
• Service interval reset procedures

Common Error Codes Covered

This manual provides diagnostic and repair procedures for common Audi manufacturer-specific fault codes, including:

Engine Codes

• P0102 – Mass Air Flow Sensor Circuit Low Input
• P0299 – Turbocharger Underboost
• P0300 – Random/Multiple Cylinder Misfire
• P0420 – Catalyst System Efficiency Below Threshold (Bank 1)
• P1545 – Throttle Valve Control System Malfunction

Transmission Codes

• P0704 – Clutch Switch Input Circuit Malfunction
• P0722 – Output Speed Sensor No Signal
• P0730 – Incorrect Gear Ratio

ABS & Chassis Codes

• C102D – Wheel Speed Sensor Fault
• C1046 – Steering Angle Sensor Calibration Required
• C1146 – Brake Pressure Sensor Fault

Network Communication Codes

• U0100 – Lost Communication With Engine Control Module
• U1113 – Function Restriction Due to Communication Fault
• U1121 – Missing Message on Data Bus

Body Control Codes

• B126A – Central Locking System Fault
• B1318 – Battery Voltage Low
• B2000 – Control Module Internal Fault

The manual also includes hundreds of additional Audi-specific diagnostic trouble codes, guided diagnostic routines, wiring diagrams, electrical testing procedures, and factory repair instructions.

Who Is This Manual For?

• Audi dealership technicians
• Independent European vehicle repair workshops
• Performance vehicle specialists
• Automotive technicians
• Track and motorsport preparation workshops
• Experienced DIY mechanics

If you are servicing, maintaining, diagnosing, or repairing a 2005 Audi TT quattro Sport, this factory workshop manual provides the complete procedures and technical information required to perform repairs to Audi factory standards.